diff --git a/pyproject.toml b/pyproject.toml
index 718c951..deb6860 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ classifiers = [
 [project.optional-dependencies]
 gemini = ["google-genai>=1.0.0,<2.0"]
 openai = ["openai>=1.0.0,<3.0"]
-anthropic = ["anthropic>=0.34,<1.0"]
+anthropic = ["anthropic>=0.100.0,<1.0"]
 groq = ["groq>=0.9,<1.0"]
 
 dev = [